An amendment to the United States Constitution guaranteeing equal rights under the law, without respect to sex (or alternatively gender), will be in force at some time before Jan 1, 2030.
Standard ambiguity clause: If the wording is found to be ambiguous I will judge on the basis of the obvious intent. If the intent is ambiguous I will judge on the basis of precise wording. If both are ambiguous or if both are clear but conflict, I will look for a solution that causes the least damage to FX as a market and game.
I intend to use the Library of Congress Web service Thomas or its successor as the primary authority. As of 20 Apr 1997 the relevant page is http://lcweb2.loc.gov/const/amend.html.
Although "gender" is a grammatical term rather than a physiological one, I assume for the purposes of this claim it is to be taken to mean "sex" and refers to the possibility of an erroneous wording in the potential ERA itself.